| Name | Arnica mollis var. petiolaris Fernald |
| Authorship | Fernald |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Arnica mollis Hooker |
| GUID | urn:lsid:ipni.org:names:20041-2 |
| Citation | 1905 Rhodora 7: 150 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Arnica mollis var. petiolaris Fernald |
| Identification made in | [no date] (1) |